Yamaha Mt 125 (mtn 125 A) (2021)
2021 Yamaha Mt 125 (mtn 125 A)
CarHunch analysed 674 real MOT records for the 2021 Yamaha Mt 125 (mtn 125 A). This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2021 Yamaha MT 125 has a first-time MOT pass rate of 69.8%, notably below the UK average of 80%, suggesting reliability concerns for this young cohort. With only 8.5% of bikes ever developing a dangerous defect, safety isn't the primary worry—the issue is instead the higher frequency of non-critical failures and advisories dragging down the headline pass rate.
At a median mileage of 8,331 miles for a three-year-old bike, these machines are running relatively gently, yet they're still accumulating 0.3 failures and 1.2 advisories per vehicle on average, pointing to durability or build-quality issues rather than owner abuse. If you're considering this model, budget for minor repairs beyond routine servicing, and ask any private seller for their full MOT history to spot which components keep failing.
What to check before buying a 2021 Yamaha Mt 125 (mtn 125 A)
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Yamaha Mt 125 (mtn 125 A)
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
CarHunch may earn a small commission if you buy via these links — at no extra cost to you.
Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (99%) | 668 | 69.6% | 0.31 |
| Other (1%) | 6 | 91.7% | 0.17 |
Mileage Distribution
Most 2021 Yamaha Mt 125 (mtn 125 A) vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2021 Yamaha Mt 125 (mtn 125 A) vehicles fall between 4,757 and 12,787 miles.
2021 Yamaha Mt 125 (mtn 125 A) — Still on the Road
Strong survival — 436 vehicles still getting MOTs in 2025, 95% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2023–2025.
MOT History Averages
Found a specific Yamaha Mt 125 (mtn 125 A)?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.